Update UITest.cs (#25507)

ui test case running fixed from visual studio

src/Controls/tests/TestCases.Shared.Tests/UITest.cs

@@ -44,7 +44,7 @@ namespace Microsoft.Maui.TestCases.Tests
 
 		public override IConfig GetTestConfig()
 		{
-			var frameworkVersion = "net8.0";
+			var frameworkVersion = "net9.0";
 #if DEBUG
 			var configuration = "Debug";
 #else